It is something that every engineer ought to consider.
He ought to be able to thoroughly appreciate this almost inconceivable
pressure. How many engineers are today running 18 and 20 horse power
engines that realizes that a boiler of this diameter is not capable of
sustaining the pressure he had been accustomed to carry in his little 26
or 30 inch boiler? On page 114 You will get some idea of the difference
in safe working pressure of boilers, of different diameters. On the
other hand this is not intended to make you timid or afraid of your
engine, as there is nothing to be afraid of if you realize what you are
handling, and try to comprehend the fact that your steam gauge
represents less than one 1-1000 part of the power you have under your
management. You never had this put to you in this light before, did
you?
If you thoroughly appreciate this fact and will try to comprehend this
power confined in your boiler by noting the pressure, or power exerted
by your cylinder through the small supply pipe, you will soon be an
engineer who will only carry a safe and economical pressure, and if
there comes a time when it is necessary to carry a higher pressure, you
will be an engineer who will set the pop back again, when or as soon as
this extra pressure is not necessary.
Pages:
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175